Lenovo S930 Manual de serviço - Página 8
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LENOVO S930 Cellphone Service Manual
3.1.2 LCD backlight doesn't light up.
Check whether connections between FPC
of LCD module and connectors on
motherboard are good. Reconnect them.
Check whether LCD backlight works.
Check whether the output of the backlight
circuit at the motherboard end is correct.
Check whether chip U1601 works.
Check whether the correct voltage is
applied on the positive and negative
backlight terminals of the LCD module.
Check whether chip U1661 works.
3.2 Cameras do not work properly.
3.2.1 Back camera does not work properly.
LCD
backlight
doesn't light up.
N
Y
N
Replace the LCD
module.
Page 8
Y
OK
N
Replace U1601.
Y
Replace U1661.
Y
OK